Connectivity Guide

Conguring QoS is a three-step process:
1 Create class-maps to classify the trac ows. The following are the dierent types of class-maps:
• qos (default)—Classies ingress data trac.
• queuing —Classies egress queues.
• control-plane—Classies control-plane trac.
• network-qos—Classies trac-class IDs for ingress buer congurations.
• application —Classies application-type trac. The reserved policy-map policy-iscsi denes the actions for class-iscsi trac.
2 Create policy-maps to dene the policies for the classied trac ows. The following are the dierent types of policy-maps:
• qos (default)—Denes the following actions on the trac classied based on qos class-map:
– Policing
– Marking with a trac class ID
– Modifying packet elds such as CoS and DSCP
– Enabling trust based classication
• queuing —Denes the following actions on the egress queues classied based on queuing class-map:
– Shaping
– Assigning bandwidth for queues
– Assigning strict priority for queues
– Buering conguration for queues
– WRED conguration on queues
• control-plane—Denes the policing of control queues for rate-limiting the control-plane trac on CPU queues.
• network-qos—Denes the Ingress buer conguration for selected trac-classes matched based on network-qos class-map.
• application —Denes the following actions for the application classied trac:
– Modifying packet elds such as CoS and DSCP.
– Marking trac class IDs.
3 Apply the policy-maps to the port interface, system for all interfaces, or control-plane trac as follows:
• Apply control-plane polices in Control-Plane mode.
• Apply QoS and network-QoS policies in the input direction on physical interfaces or in System-Qos mode.
962
Quality of service